As far as Ruby is concerned, Sam isn't responsible for anything Lucifer did. Sam's only failing was not realizing that Lucifer would twist any deal made. It's a conversation they will have over and over most likely for the rest of their lives.

Dean nods at Sam's thanks. He could tell him that it was nothing, but it hadn't been. No one had wanted to stick by Ruby when she'd shown up in his camp. For weeks, even after she'd recovered, Dean had insisted she stay in his cabin or near him for fear that someone within the camp would try to take her out (it's probably one thing that had led to the hate/grief sex between them that had persisted sporadically until the younger version of Sam had shown up). "Yeah, I'm still not sure how many angels were responsible for the whole time switch thing." It had done the job, providing a catalyst that had broken through to Dean and Sam.

After a moment, Dean speaks again. "You like it here?" he gestures to the town around them.